About Scubapro Mark 25 Regulator, First Stage Only

Scubapro has been the Leader in the Evolution of Piston Controlled First Stages since its beginning; the MK25 carries on this heritage with an array of patented features ensuring Unfailing Performance. The MK25 is a Balanced Piston First Stage, Scubapro's Absolute-Top-Performer. It is a Superior-Regulator thanks to its Ultra-Stable Intermediate Pressure (IP) resulting in an Extremely-Punctual-and-Constantly-High-Delivery of Air. This means Instant-Airflow at Any-Tank-Pressure and Water-Temperature for a real Carefree-Dive.

Air Balanced, Flow-Thru-Piston- First Stages with Air Balanced Pistons deliver Significantly-More Air to the Second Stage than any other First Stage, while their performance is totally unaffected by the changing tank pressure. A Balanced Piston allows the use of Lighter-and-More-Sensitive Components, resulting in Ultra-Fast Breathing Response, instant delivery of air on demand, and extra high air flow, especially in low tank pressure ranges. The tired diver benefits from a smoother breathing regulator during the ascent or deco stop. Balanced Piston First Stages are the first choice of demanding sport divers and professionals. A Balanced Piston performs equally in warm and cold water environments.

The MK25 has two opposite High Pressure Ports (HP). The arrangement of high and low pressure hoses is crucial to diving comfort. Two opposite HP Ports allow for an individual positioning of the first stage (pointing up or down). This allows the diver to position the gauges either on the right or left side and increases the freedom of movement for head and neck. Multiple Low Pressure Ports (LP) - For ultimate freedom in the arrangement of LP hoses, the MK25 accommodates five HF (High Flow) Ports on a Swiveling Turret, which allows for 360° Degree Swivel of Hoses. High Flow Ports deliver about 15% more air than conventional ports. Externally adjustable intermediate pressure- Allows authorized Scubapro service technicians to quickly fine-tune and adjusts the first stage after maintenance without the need to disassemble it.

Cold Water Diving with Scubapro-Diving conditions can be drastically different, including extreme cold water and outside temperatures, posing the possibility of a regulator "freezing". Therefore, Resistance-to-Freezing is Imperative for the diver. All Scubapro Regulator Systems are CE Approved for 3360psi (230 bars) Cold Water Diving. Some models go even beyond this Super-Stringent-Qualification and have successfully been Tested-in-Extreme-Cold-Diving-Conditions at less than 36°F (2.2°C). As a Specific-Anti-Freezing-Measure, Scubapro engineers have designed a Patented Finned Cap for the MK25 First Stages for Optimal-Cold-Water-Diving. This Finned Cap is a Thermal Insulating System (TIS).The Ribs of the TIS Act-as-a-Radiator to Increase the Surface-Area of Heat-Transfer from the Water to Warm-Up the Internal-Parts that have been Drastically-Cooled-Down by the Gas-Pressure-Drop. The MK25 is manufactured from Marine-Grade Chrome Plated Brass and offers a Balanced Composite/Stainless Steel Flow-Thru Piston that would make any diver proud. It demonstrates Scubapro's dedication to quality and creating positive diving experiences. The MK25 is manufactured from Marine-Grade Chrome Plated Brass, weighs 29.1 oz (825 g) and is covered by a limited lifetime warranty. Note: First Stage Regulator does not include a Low Pressure Hose.

Scubapro Mark 25 Regulator, First Stage Only Specifications

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Questions about this item:

Enrique O
There is some care?, to have in mind with this regulator, because it is not environmentally sealed, and I used to dive in salt water. Some regulator manufacturers offered kits to seal the regulator from the environment. Does SqubaPro has something like this? or Offered a Sealed MK25 Regulator?

PAULA A
I have used mine only in saltwater with no additional sealing. There is no problem. Of course follow good rinsing procedures after each dive. I like my MK25, as it fits well as far as how the hoses come off of it.
Good luck !

KATHY W
Can I use the Mark 25 1st stage safely with another brand of 2nd stage that I currently have?

JOHN B
I would think so. The Mark 25 is nothing more than a pressure reducing valve. So no matter what the tank pressure is, the Mark 25 will keep a constant pressure (say 125 psig) supplied to your second stage. The Mark 25 doesn't care who's second stage is connected. The performance should be the same.

Shopper
If i buy the 1st and 2nd stage separate is there any additional pieces needed to put them together?

Monica s
No, only tools. An allen wrench to remove the 1st stage port plug, and a wrench to tighten the 2nd stage to the 1st stage.